When the user calls up Lacona, every command that uses a URL will now be
able to use My Homepage. For example, you could now type
open My Homepage or translate My Homepage to Spanish.

Extensions with Methods

The result of a URL is just a String, but some phrases have more complicated
results.

lacona-phrases#PreferencePane for example, can not be represented by a simple
string. Rather, its result should be an object with methods that do things.
In the case of PreferencePane, there is one method called open.
If you are extending
a phrase like this, one good way is to use a class definition, like so: